Ticket #48289 - 389-ds-base: ldclt-bin killed by SIGSEGV

Description: If NULL source string was passed to parseFilter, it caused
NULL dereference.

https://fedorahosted.org/389/ticket/48289

Reviewed by [email protected].

ldap/servers/slapd/tools/ldclt/ldclt.c

@@ -929,6 +929,11 @@ parseFilter (
 {
   int	 i, j;
 
+  if (!src) {
+    printf ("Error: NULL source string is passed.\n");
+    return (-1);
+  }
+
   for (i=0 ; (i<strlen(src)) && (src[i]!='X') ; i++);
   *head = (char *)malloc(i+1);
   if (*head == NULL)